Keystone - Accessories

Part Number	Description / PDF	Quantity
AX100590 Belden	EZ-MDVO KEYST.RJ11 USOC	0
AX101762 Belden	KIT MFLEX FILLER INSERT(10/PK)	125
AX102411 Belden	KIT MFLEX KCONN INSERTS(10/PK)	0
AX101760 Belden	KIT MFLEX FILLER INSERT(10/PK)	0
AX102016 Belden	COLORED BEZEL MDVO-STYLE	0
AX100207 Belden	EZ-MDVO ID CAP, VOICE,	0
HIPOG Belden	HIP O-RING, UNIVERSAL, GREEN	0
AX104594-01 Belden	MEDIAFLEX ANGLE DG 12P ADAPTER	0
AX102577 Belden	KIT MFLEX FILLER INSERT	0
AX101751 Belden	KIT MFLEX MDVO INSERTS (10/PK)	0
AX100587 Belden	EZ-MDVO KEYST.RJ45 A/B	0
AX102573 Belden	KIT MFLEX MDVO INSERTS(10/PK)	0
AX102014 Belden	COLORED BEZEL MDVO-STYLE	0
HIPOK Belden	HIP, O-RING, UNIVERSAL, BLACK	0
AX102612 Belden	KIT MFLEX MDVO INSERTS (10/PK)	0
AX101763 Belden	KIT MFLEX FILLER INSERT(10/PK)	196
AX100187 Belden	EZ-MDVO ID CAP, BLANK,	0
HIPOR Belden	HIP O-RING UNIVERSAL, RED	0
HIPOY Belden	HIP, O-RING, UNIVERSAL, YELLOW	0
AX102730 Belden	KIT MFLEX MDVO INSERTS (10/PK)	0

Keystone - Accessories

1. Overview

Keystone connectors and accessories are standardized modular connection systems widely used in telecommunications, data networking, and electronic equipment. Defined by their universal rectangular interface design, these components enable rapid deployment of reliable electrical or optical connections. Their importance stems from their role in structured cabling systems, supporting Ethernet, telephone, and video applications across residential, commercial, and industrial sectors.

2. Main Types & Functional Classification

Type	Functional Characteristics	Application Examples
RJ45 Keystone Jacks	8P8C configuration for Ethernet connectivity	LAN networks, PoE devices
RJ11/RJ12 Modules	6P6C/6P4C for telephone systems	VoIP, PBX systems
Fiber Optic Adapters	LC/SC interface for optical signal transfer	Data centers, backbone networks
Coaxial Connectors	75 impedance for video/audio signals	Surveillance systems, CATV
USB Keystone Ports	Type-A/B/C configurations for device charging/data transfer	Smart building systems, workstations

3. Structural Composition

Typical keystone components feature:

Mechanical: Standardized 9.8 10.5mm footprint with snap-in latch mechanism
Electrical: Phosphor bronze contacts with gold-plated (50-100 in) contact surfaces
Materials: High-temperature resistant thermoplastic housing (UL94 V-0 rated)

4. Key Technical Specifications

Parameter	Typical Value	Importance
Contact Resistance	20m	Ensures signal integrity
Insulation Resistance	500M	Prevents electrical leakage
Rated Current	1.5A (RJ45), 2.0A (power variants)	Determines power delivery capability
Operating Voltage	125VAC/DC	Defines safe operating limits
Mating Cycles	750 cycles	Indicates mechanical durability

5. Application Fields

Telecommunications: Central office switching systems, DSL networks
Data Centers: Server rack interconnects, 10GbE infrastructure
Smart Buildings: Integrated cabling for HVAC, security systems
Consumer Electronics: Home theater systems, network-attached storage

6. Leading Manufacturers & Products

Manufacturer	Representative Product
TE Connectivity	NetShelter SX Keystone Jacks
Amphenol	OptiCore Fiber Adapters
Legrand	Keystone Modular Patch Panels
Siemon	Z-Max 6A Category RJ45

7. Selection Guidelines

Key selection criteria:

Signal Type: Match impedance (100 for Ethernet, 75 for video)
Environmental Factors: Consider shielded variants (FTP/SFTP) for EMI-prone areas
Certification Requirements: Check for TIA/EIA-568-C.2 or ISO/IEC 11801 compliance
Future-Proofing: Select Category 6A or higher for new installations

Case Study: A 500-node corporate LAN deployed shielded keystone jacks with 0.1dB insertion loss to minimize crosstalk in high-density server rooms.

8. Industry Trends

Emerging developments include:

Miniaturization: Sub-8mm keystone form factors for space-constrained IoT devices
High-Speed Evolution: 25/40GbE capable keystone solutions with improved crosstalk suppression
Smart Connectivity: Integrated PoE monitoring keystone modules with remote diagnostics
Eco-Design: Halogen-free materials and 100% recyclable thermoplastic housings